Seiko Cal. 5658 - 721

Released in 1975, the Cal. 5658 with design code 721 was part of Seiko's domestic market collection. The Fixed bezel and 35mm case give it a distinctive presence on the wrist. [seikata-wm-d956cb56ac2b]

Also known as: Sumo, Emperor

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

35mm

Case Thickness

10.1mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

150m

Dial Color

Black

Jewels

32j

Frequency

21,600 bph

Power Reserve

70 hours

Year

1975

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